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Experimental Study on Modeling of Dispersed Phase Droplet Size after Orifice Plate Throttling
Author(s): 
Pages: 1314-1321
Year: Issue:  6
Journal: Journal of Chemical Engineering of Chinese Universities

Keyword:  黏度粒径估值实验验证液滴破碎孔板节流含油污水;
Abstract: 节流后分散相液滴粒径的准确估值是研究低剪切节流阀的关键,然而现有节流后液滴粒径估值模型的计算结果差异较大,迄今缺乏估值精度和适用性评价等方面的专门研究.文章通过孔板节流室内实验,分析了现有湍流场内液滴破碎后粒径估值模型的精度和适用性;讨论了分散相液滴单次节流后最大粒径与多次节流后稳定粒径间的对应关系;提出了不设实验常数的液滴单次节流后粒径估值模型.结果 表明:现有液滴粒径估值模型含有与分散相黏度相关的实验常数,缺乏普适性;在考察的分散相粒径范围内,液滴单次节流后最大粒径为多次节流后稳定粒径的2.74倍;当入口分散相粒径远小于节流孔孔径时,所提出的估值模型计算得到的粒径值与实测d95粒径间平均误差不大于17.2%.
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